.menu-btn {
    display: block;
    position: relative;
    cursor: pointer;
    font-size: 63%;
    letter-spacing: -0.1em;
    text-align: center;
    width: 60px;
}
.menu-btn span:first-child {
    top: 0;
}
.menu-btn span:nth-child(2) {
    top: 12px;
}
.menu-btn span:nth-child(3) {
    top: 24px;
}
.menu-btn span {
    left: 9px;
}
.menu-btn span {
    display: block;
    width: 32px;
    height: 4px;
    background-color: #444;
    transition: 0.2s ease-in-out;
    position: absolute;
    border-radius: 8px;
}
.menu-btn:hover span:first-child {
    top: -4px;
}
.menu-btn:hover span:nth-child(3) {
    top: 28px;
}
.menu-btn.active span:first-child {
    transform: rotate(-45deg);
    top: 12px;
}
.menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.menu-btn.active span:nth-child(3) {
    transform: rotate(45deg);
    top: 12px;
}